Neurostimulation pain-relief device company SPR Therapeutics has raised its series A round of investment to $2.2 million. The Cleveland-area company, whose pain-relief system is aimed at reducing shoulder pain in patients who’ve suffered strokes, has also engaged an investment banking firm to look for strategic partnerships, CEO Maria Bennett said. SPR is “very flexible” in the types of partnerships it’s looking for and is open to commercialization and technology development partners, as well as an outright acquisition, Bennett said.